Interference device



Fig. 1.1 is a front view of an interference device showing our new design;

Fig. 1.2 is a rear view thereof;

Fig. 1.3 is a left side view thereof;

Fig. 1.4 is a right side view thereof;

Fig. 1.5 is a top view thereof;

Fig. 1.6 is a bottom view thereof; and

Fig. 1.7 is a top perspective view thereof.

The broken lines in the figures depict portions of the interference device that form no part of the claimed design. 

CLAIM The ornamental design for an interference device, as shown and described. 